As of September 2017, the new Laws of Duplicate Bridge are in effect. For the most part there are only a few major changes from the previous Laws. Below are resources to help explain these changes.
Video Resouces – A collection of 14 videos featuring ACBL TDs discussing the major changes.
Document Library – A side-by-side comparison of the previous Laws to the current 2017 Laws. This library also includes several documents that discuss the changes in more detail.